Render is taking way too long
1 hour is not outrageously long for a 1080p frame, depending on your hardware (of course). With only a screenshot of your render settings, it's difficult to suggest too many optimizations. Here's the best I can do:


I notice you have 4 diffuse bounces, but only 2 glossy bounces. While your particular scene might be different, in most cases diffuse bounces are less important. In most scenes anything over 2 is a fairly subtle change. It's fairly noticeable if you compare renders with, say, 2 vs 4 diffuse bounces, but if you don't have that comparison the missing light from the extra bounces isn't obvious. Whereas with glossy bounces often larger numbers are needed to avoid black reflections. Again, I'm speaking generally here. I have not seen your render, and this may not be the case for your particular scene.
2500 samples (50^2, since you have square samples enabled) is a fairly large amount of samples. Your scene may not need that many.
Branched path tracing may be helpful, particularly if your scene has empty regions or tricky lighting. Branched PT is not always faster (such as with motion blur or DOF), and has more memory overhead on GPU so it's not always helpful, but it may be. See this answer for more info: What is branched path tracing and how is it useful?